. A treatise on practical anatomy: for students of anatomy and surgery . f rods and cones, or Jacobs mem-brane, consists of rods and cones, arranged perpendicu-larly to the surface. They each consist of an inner andouter segment, connected together by a cement sub-stance. The outer segments arc transversely striated,the inner segments striated and granular. 3. External limit-ing membrane, a lam-ina of cellular tissue. 4. Outer nuclearlayer, consisting ofbipolar cells trans-^Trsely striated, calledrod granules. Theyare connected by oneextremity with a rod ;the other enters theouter molecular la
. A treatise on practical anatomy: for students of anatomy and surgery . f rods and cones, or Jacobs mem-brane, consists of rods and cones, arranged perpendicu-larly to the surface. They each consist of an inner andouter segment, connected together by a cement sub-stance. The outer segments arc transversely striated,the inner segments striated and granular. 3. External limit-ing membrane, a lam-ina of cellular tissue. 4. Outer nuclearlayer, consisting ofbipolar cells trans-^Trsely striated, calledrod granules. Theyare connected by oneextremity with a rod ;the other enters theouter molecular cone-granules,less in number, aremultipolar, nucleatedcells, which are con-nected by numerousprocesses with thecone, and terminate internally in a single pole, whichpasses into the outer molecular layer. 5. The outer molecular layer consists of a net-workof delicate fibres, with some ganglion cells. It has agranular appearance. 6. The inner nuclear layer consists of bipolar, nuclearcells, the poles of which communicate with a ganglioncell and a rod or cone. 27. Fig. 179.—Diagram of the FormationOF TiiK Retina. N, optic nerve ; K, retiua ; p, pigment layer; c, choroid. 418 PRACTICAL ANATOMY. 7. The inner molecular layer is a thick layer, gran-ular in appearance, which is formed of a dense net-workof fibres, imbedded in which are some ganglion cells. 8^ Ganglion cell-layer, a single layer of large flask-shaped cells, having an inner pole, which communicates with an optic-nerve fibre,and several externalbranched poles, whichpass into the inner molec-ular layer. 9. Optic-nerve fibre-layer consists of a layerof naked axis-cylinders,which pierce all the otherlayers of the radiate from thedisk, and also form fre-quent plexuses. Somecommunicate with theganglion cells, otherspass outward throughthe molecular layer. 10. The membranalimitans interna isformed of cellular tissue. The retina is sup-ported by a connective-tissue stroma, arranged between the internal and
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomy, bookyear1891
